Do you remember me telling you we are practicing non-verbal spells, Potter?" "Yes," said Harry stiffly. "Yes, sir." "There's no need to call me "sir" Professor." The words had escaped him before he knew what he was saying.
J. K. RowlingWhen he straightened up again, there were six Harry Potters gasping and panting in front of him. Fred and George turned to each other and said together, "Wow -- we're identical!
J. K. Rowling